Although, the budget for these services outlined in June 2017 was £8.03bn.

The overspend comes despite increasing the children’s services budgeted expenditure for 2017-18 by 2.5% compared to the year before.

Paul Carter, chair of County Councils Network and leader of Kent County Council, said counties had “little choice” but to overspend on children's services.

He said: “In a climate of rising demand, inflation and substantial funding reductions imposed by central government, counties have delivered extraordinary efficiencies, but without extra resource the worst is yet to come in service cutbacks to prevent huge margins of overspent in statutory services.”

The CCN said in English counties the number of children taken into care stood at 26,000 in 2017, compared to 22,600 in 2011 - a 15% increase.

The organisation said county councils overspent the most in children’s services - £264m more than they budgeted.

Paul Dossett, head of local government at consultancy firm Grant Thornton, said: “Children’s services have faced challenging savings targets over a number of years.

“These figures demonstrate the extent to which local authorities are struggling to cope as demand continues to rise, which is heavily linked to pressure on council resources and the wider impact of austerity and benefit reform on the more deprived parts of the country.”

Director of the New Local Government Network Adam Lent told PF: “This will just add more focus to the fact that children services are now as much, if not more, of a financial pressure on councils as adult social care.”

He called for more investment from government so councils could focus on preventative children’s services.

He told PF: “We know that those councils that have moved to a preventative model have had better performance and have saved money, but the problem is that requires up front investment”.

He believed the MHCLG figures should be evidence to the government that council's needed a long-term financial settlement for all services, similar to the NHS.

“I think this is another piece of evidence that piles yet more pressure on the chancellor to change the situation in local government in the autumn budget,” Lent explained.

“Constant, short-term, stopgap solutions are unsustainable as a way of funding local government.”

Finding up front investment is difficult, Lent said, in a sector that has seen a 50% reduction in government funding since 2010-11m, as highlighted by the National Audit Office earlier this year.

2015 Public Finance. Public Finance is published on behalf of the Chartered Institute of Public Finance and Accountancy by Redactive Publishing Ltd. All rights reserved. Reproduction of any part is not allowed without written permission. Redactive, 17-18 Britton Street, London, EC1M 5TP